I appreciate the tip. I have read that before, and I try to leave a bit of gas in the mags after I am done with them.
Now, I have a new cylinder, and this one doesn't leak! But I am still having the problem with filling. I can a little bit of gas in on an attempt, though it seems that either something on the adaptor is mis-aligned, or that for some reason, gas is having a heck of a time trying to enter into the magazine. If I blew the seals, I am assuming gas would go in fine, it would just keep leaking out. Is there a reason that it would make it difficult for it to enter?